Higher price and higher usage are not the same thing, a less used dollar would not necessarily have lower value. The evolution of foreign exchange market turnover would be a better indicator to look at : https://en.wikipedia.org/wiki/Currency_pair#Base_currency // https://www.bis.org/statistics/rpfx22_fx.pdf

(it's also increasing in the 3 last years)

1) it was much stronger in 1985

2) just because it’s strong now doesn’t mean it cannot ever fail. Ray Dalio’s new book might interest you as he breaks down past world powers and how their currencies (which were global reserve currencies at the time) collapsed